Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4907102 | Magnetic recording playback | Takashi Iwasawa | 1990-03-06 |
| 4807055 | Multi-speed magnetic recording playback | Takashi Iwasawa | 1989-02-21 |
| 4587577 | Tape position data recording and reproduction method | — | 1986-05-06 |
| 4408319 | Optical information recording mother disc and method of producing the same | Takashi Nishio, Eiki Tanikawa | 1983-10-04 |